/*
  * Mirante Tecnologia
  * Copyright 2010, Mirante Informatica LTDA, 
  * and individual contributors as indicated by the @authors tag
  *
  * This is free software; you can redistribute it and/or modify it
  * under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation; either version 2.1 of
  * the License, or (at your option) any later version.
  *
  * This software is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this software; if not, write to the Free
  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
  */
package com.miranteinfo.seam.hibernate;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

/**
 * Proxy para proxiar a sessao do hibernate sempre que uma nova sessao for criada.
 * 
 * @author lucas lins
 * 
 */
public class SessionFactoryProxy implements InvocationHandler{

	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	// ATTRIBUTES
	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	
	private SessionFactory sessionFactory;
	
	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	// CONSTRUCTOR
	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	
	public SessionFactoryProxy(SessionFactory sessionFactory){
		this.sessionFactory = sessionFactory;
	}
	
	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	// PUBLIC METHODS
	// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	
	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
		
		Object result = method.invoke(sessionFactory, args);
		
		if(method.getName().equals("openSession")){
			return Proxy.newProxyInstance(SessionFactoryProxy.class.getClassLoader(), result.getClass().getInterfaces(), new SessionProxy((Session) result));
		}else{
			return result;
		}
	}
	
}
